Diagnostic performance of endoscopic classifications for neoplastic lesions in patients with ulcerative colitis: A retrospective case-control study

Table 3 Diagnostic performance (95% confidence interval) for each type in the Japan Narrow-Band Imaging Expert Team classification

	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
UCAN JNET type 2A
Experts	50.0 (10.2–85.6)	94.7 (90.5–98.5)	50.0 (10.2–85.6)	94.7 (90.5–98.5)	90.5 (82.9–97.3)
Non-experts	100 (36.9–100)	78.9 (72.3–78.9)	33.3 (12.3–33.3)	100 (91.6–100)	81.0 (68.9–81.0)
UCAN JNET type 2B
Experts	78.6 (64.6–89.5)	57.1 (29.2–79.1)	78.6 (64.6–89.5)	57.1 (29.2–79.1)	71.4 (52.8–86.1)
Non-experts	78.6 (63.8–87.9)	71.4 (41.9–90.0)	84.6 (68.7–94.6)	62.5 (36.6–78.8)	76.2 (56.5–88.6)
UCAN JNET type 3
Experts	60.0 (27.5–75.9)	93.8 (83.6–98.7)	75.0 (34.4–94.9)	88.2 (78.7–92.9)	85.7 (70.3–93.3)
Non-experts	40.0 (14.9–40.0)	100 (92.2–100)	100 (37.3–100)	84.2 (77.6–84.2)	85.7 (73.8–85.7)
SN JNET type 2A
Experts	75.0 (62.6–75.0)	100 (71.6–100)	100 (83.4–100)	63.6 (45.5–63.6)	82.6 (65.3–82.6)
Non-experts	87.5 (74.7–92.5)	85.7 (56.4–97.1)	93.3 (79.6–98.7)	75.0 (49.3–85.0)	87.0 (69.1–93.9)
SN JNET type 2B
Experts	100 (63.4–100)	83.3 (73.2–83.3)	62.5 (39.6–62.5)	100 (87.8–100)	87.0 (71.0–87.0)
Non-experts	80.0 (42.6–96.1)	83.3 (72.9–87.8)	57.1 (30.4–68.7)	93.8 (82.1–98.8)	82.6 (66.4–89.6)
SN JNET type 3
Experts	50.0 (11.2–50.0)	100 (96.3–100)	100 (22.4–100)	95.5 (91.9–95.5)	95.7 (88.9–95.7)
Non-experts	50.0 (11.2–50.0)	100 (96.3–100)	100 (22.4–100)	95.5 (91.9–95.5)	95.7 (88.9–95.7)

CI: Confidence interval; NPV: Negative predictive value; PPV: Positive predictive value; SN: Sporadic neoplasms; UCAN: Ulcerative colitis-associated neoplasms; JNET: Japan Narrow-Band Imaging Expert Team.